降低木薯酒精生产综合能耗的技术途径

Technology on Reducing Overall Energy Consumption of Cassava Alcohol Production

我国木薯酒精行业,能耗高的问题比较突出,为降低综合能耗,研究了原料预处理、粉碎与蒸煮工艺优选、浓醪发酵、差压蒸馏和热泵技术等的节能途径。结果表明:去皮、清洗后粉碎可节电3.78%～6.62%、节汽3.82%～6.69%,增加粉碎级数、提高粉碎细度、降低蒸煮温度可节约蒸煮用汽32.15%,采用差压蒸馏比常压蒸馏节汽超过40%,热泵技术回收废醪余热可节汽10.21%～9.73%。

To solve the problem of high energy consumption in cassava alcohol production industry and reduce o- verall energy consumption, the paper focuses on energy saving in pre-treatment of raw material, optimization of grind- ing and cooking processes, fermentation using of high-concentration mash, differential pressure distillation and heat pump technique etc.. The results show that 3.78% ~ 6.62% of electricity and 3.82% -6.69% of steam could be saved by peeling and cleaning cassavas. Furthermore, increasing the grinding grade and fineness and decreasing the cooking temperature save 32. 15% of steam. Meanwhile, more than 40% of steam could be saved via differential pressure distillation compared to normal pressure distillation, and 10.21% -9.73% of steam could be saved by using heat pump for recycling of effluent residual heat.